121105120786455 has 32 divisors (see below), whose sum is σ = 208698192460800. Its totient is φ = 59613910093440.

The previous prime is 121105120786451. The next prime is 121105120786493. The reversal of 121105120786455 is 554687021501121.

It is not a de Polignac number, because 121105120786455 - 2² = 121105120786451 is a prime.

It is a super-2 number, since 2×121105120786455² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121105120786451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35187405 + ... + 38475494.

It is an arithmetic number, because the mean of its divisors is an integer number (6521818514400).

Almost surely, 2^{121105120786455} is an apocalyptic number.

121105120786455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121105120786455 is a deficient number, since it is larger than the sum of its proper divisors (87593071674345).

121105120786455 is a wasteful number, since it uses less digits than its factorization.

121105120786455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73671351.

The product of its (nonzero) digits is 672000, while the sum is 48.

The spelling of 121105120786455 in words is "one hundred twenty-one trillion, one hundred five billion, one hundred twenty million, seven hundred eighty-six thousand, four hundred fifty-five".